Abstract: A method of manufacturing a reversible heat-sensitive recording medium capable of manufacturing a reversible heat-sensitive recording medium invulnerable toward scratches, etc. even when printing/erasing is repeated under situation where dirt and dust tend to attach to the reversible heat-sensitive recording medium, thus providing increase durability of the reversible heat-sensitive recording medium against repeated printing/erasing. In the method of manufacturing the reversible heat-sensitive recording medium containing a reversible heat-sensitive recording layer and a substrate sheet, a reversible heat-sensitive recording sheet or a reversible heat-sensitive recording transfer sheet having the reversible heat-sensitive recording layer applied to the substrate sheet through welding, after which a protective layer is formed on the reversible heat-sensitive recording layer.

Abstract: A reversible heat-sensitive recording medium has a substrate where a reversible heat-sensitive recording layer and a protective layer are successively formed on top of it. The reversible heat-sensitive recording layer is formed by a reversible heat-sensitive recording material including a leuco dye and a color developing/reducing agent. The color developing/reducing agent is a combination of two kinds of color developing/reducing agents, one with a high color developing ability and the other with high image preservation and stabilization capabilities. The two agents are combined at a ratio between 1:4 to 4:1. Thus a reversible heat-sensitive recording material with a fine color developing ability and high image preservation and stabilization capabilities can be obtained.

Abstract: A thermal recording medium good in recording sensitivity and recording stability comprising a metal thin layer, a heat sensitive softening layer placed in contact with said metal thin layer, a contrasting layer placed in contact with said heat sensitive softening layer or said metal thin layer and having a visual contrast to said metal thin layer, and a heat sensitive color forming layer placed in contact with said heat sensitive softening layer or said metal thin layer on the side of said metal thin layer opposite to the side where the contrasting layer is positioned.